Def. pub
covered elastic yarn and method of making same



1% 300; DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 0.G. 1221. Identification is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheets 0! drawing contained in the application as originally filed. The file of this application is available to the public for inspection; reproduction may be purchased for 30 cents per sheet.

Applications published under the Defensive Publication Program have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED NOVEMBER 18, 1969 778,096 COVERED ELASTIC YARN AND METHOD OF MAKING SAME Salim M. Ibrahim, 2304 Riddle Ave., Wilmington, Del. 19806 I Filed Nov. 22, 1968. Published Nov. 18, 1969 Int. Cl. D02g 3/36 U.S. Cl. 57-152 6 Claims 1 Sheet Drawing. 15 Pages Specification A process for plying one or more ends of a torque textured sheath yarn having a pseudo twist with an extended elastomeric core yarn wherein the ply twist applied is in the same direction as the pseudo twist of the torque textured yarn. When more than one end of sheath yarn is used the pseudo twist of the sheath yarns is in the same direction. The sheath filaments of the core-ply yarns of this invention are torque-textured thermoplastic yarns and may be polyamides, polyesters, polyolefins, or the like. The sheath yarn component may be of any convenient size, preferably in the range of from about 15 to about 200 denier, the denier per filament ranging from about 2 to about 5. The core yarn component is preferably spandex, and its denier is in the range of from about 20 to about 280. The spandex is extended from about 3 to about 5 depending on denier. The ply twist may range from about 10 to about 35 turns per inch for the heavy to the fine core-ply deniers respectively. The core-ply yarns are wound on conventional packages, i.e., using enough tension to maintain the yarn in a fully extended state. The process afiords a twist-on-twist effect, thereby better utilizing the inherent characteristics of the torquetex-tured yarn. The core-plied yarns of this invention are unexpectedly better in cover, uniformity, and power than similar yarns known heretofore.

9 /g g0 I 776 096 1969 s. M. IBRAHIM DEF. PUB.

COVERED ELASTIC YARN AND METHOD OF MAKING SAME Filed Nov. 22, 1968 FlGi. 1

INVENTOR SALIM M. IBRAHIM BY A/ M ATTORNEY 

